| 摘要 |
A mug with swivel-rings includes a cylindrical mug body having an outward flange around the top opening, a locating ring mounted around the mug body at the bottom through a high-frequency sealing process, an arched handle having two opposite ends respectively fixedly fastened to the outward flange of the mug body and the locating ring, and a plurality of swivel-rings revolvably mounted around the mug body and stopped between the outward flange of the mug body and the locating ring. The swivel-rings are respectively printed with a series of numbers or drawings such that they can be turned for learning or teaching arithmetic, or for providing various changeable patterns.
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